Item Type: Effect Pedal Knob_x000D_ Material: Plastic_x000D_ Color: Transparent 1Easy Adjustment: The control knob allows for easier adjustment on the tone, volume, potentiometer, etc. to meet your needs. 2Higher Accuracy: Ensuring high accuracy in the smoother adjusting, the effect pedal knob can better arrange beautiful melody. 3Good Decoration: Simple in style but pretty in colour, the control knob is also a beautiful decoration for your instrument. 44Pcs in the Set: With 4pcs controller knob in the set, which largely simplifies the replacement of old and damaged parts. 5Easy to Install: Comes with a light weight and a compact size as well, the slot designed knob is very convenient to install.4 x_x000D_ _x000D_ Effect Pedal Knob